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2008 | 113 | 3 | 1099-1102
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Simulation of Reaction-Induced Phase Separation in Surface Alloy

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Using kinetic Monte Carlo method we simulate the dynamics of biatomic Au_{0.3}Ni_{0.7} surface alloy separation on Ni(111) due to Ni(CO)_4 out-reaction. The experiment of Vestergaard et al. is modeled by counterbalancing dynamical processes and interactions between reactants. The simulations demonstrate step flow rate increase with CO coverage, c_{CO}, in qualitative agreement with the experiment only for c_{CO} ≲ 0.45 monolayer. Moreover, we demonstrate both CO influence on reaction process and Au domain formation.
  • Department of Physics, University of Latvia, Raina 19, LV-1586, Riga, Latvia
  • Institute for Solid State Physics, Kengaraga 8, LV-1063, Riga, Latvia
  • Semiconductor Physics Institute, Goštauto 11, LT-01108, Vilnius, Lithuania
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  • 2. V.P. Zhdanov, R.T. Vang, J. Knudsen, E.K. Vestergaard, F. Besenbacher, Surf. Sci. Lett. 600, L260 (2006)
  • 3. G. Zvejnieks, V.N. Kuzovkov, Phys. Rev. E 63, 051104 (2001)
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  • 5. K. Termentzidis, J. Hafner, F. Mittendorfer, J. Phys., Condens. Matter 18, 10825 (2006)
  • 6. V.K. Medvedev, R. Börner, N. Kruse, Surf. Sci. 401, L371 (1998)
  • 7. C. Quiros, O. Robach, H. Isern, P. Ordejon, S. Ferrer, Surf. Sci. 522, 161 (2003)
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